JPS596337Y2 - Indoor unit for air conditioner - Google Patents

Description

[Detailed description of the invention] The present invention relates to an indoor unit for an air conditioner that is used in connection with an outdoor unit via piping for refrigerant circulation. It is characterized by preventing the generation of frictional noise that would occur due to the large coefficient of friction with the housing.

This type of indoor unit has a heat exchanger, a fan, etc. installed in a casing that forms the external shape of the unit, and performs cooling or heating using a refrigerant supplied from the outdoor unit via piping. The inner surface of the fan housing, which corresponds to the cold air passage or hot air passage in the indoor unit, is provided with a heat insulating material in order to effectively supply cold air or hot air to the desired air-conditioning area, and to prevent dew condensation on the outer surface of the fan housing during cooling. is attached.

For example, a hard heat-insulating material made of a foam material such as styrene foam or urethane foam with a foaming ratio of 15 times is economical as a heat-insulating material, and is easy to attach to the fan housing. Since the coefficient of friction between the fan housing and the composite resin or metal that makes up the fan housing is large, when the insulation material expands or contracts due to the influence of cold or hot air, frictional noise between the fan housing and the insulation material is generated, which can be dangerous for people. There was a problem that it caused discomfort.

This invention was devised in view of the above points, and consists of a pair of hard molded insulation materials that have a high coefficient of friction with the fan housing, a part of each insulation material is fixed, and a part is attached to the fan housing with a polyethylene molded insulation material. Its purpose is to eliminate the generation of frictional noise caused by temperature changes without sacrificing the advantages of the hollow-type insulation material by installing it in the indoor unit in slidable contact via a film. It is.

In order to achieve this purpose, the structure of the present invention is to provide a fan having pivot support on both side wall surfaces of the fan housing, in front of the back plate surface of the fan housing of the indoor unit;
An air conditioner in which a heat exchanger is disposed, and a tough gradual heating material that is made of clay and has a large coefficient of friction with the back plate surface is disposed between the fan, the heat exchanger, and the back plate surface. In the aircraft cabin unit, the heat insulating material is constituted by a pair of heat insulating material elements each formed by one side plate part and a back plate part continuous to the rear edge of the side plate part, and each of the heat insulating materials fixing the element to each of the side wall portions in a pasted manner;
Each of the back plate parts is slidably abutted on the back plate surface via a polyethylene film, and each side end of each of the back plate parts is arranged to face each other with a gap, so that each heat insulation Due to the polyethylene film interposed between each back plate part of the material element and the back plate surface of the fan housing, frictional noise is generated between the heat insulating material element and the fan housing even when the heat insulating material element thermally expands or contracts. In addition, the distance between each side plate portion and each side end of the fan is maintained constant on the left and right sides, so that the flow state of air at both side ends of the fan does not become uneven, and furthermore, the heat insulating material is Even if it shrinks due to heat, it will not come into contact with the side end of the fan.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An indoor unit of an air conditioner according to an embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a front view of this embodiment, and the indoor unit has a casing formed by a substantially box-shaped fan housing 1 and a front case (not shown) that covers the front opening of the fan housing 1. A heat exchanger 4 and a cross flow fan 5 are installed inside the casing.

FIG. 2 is a diagram showing a main part of a cross section taken along the line II-II in FIG. The motor 6 connected to the shaft on one side of the fan 5 is connected to the fan housing 1.
The fan housing 1 is supported by a motor support stand 7 formed on one side of the fan housing 1, and a bearing 8 that pivotally supports the shaft on the other side of the fan 5.
By supporting the fan 5 on a bearing pedestal 11 formed on the other side of the motor support 7 and the bearing pedestal 11, the fan 5 is supported on each inner surface of the motor support 7 and the bearing pedestal 11, that is, on each side wall surface 1b, I of the fan housing 1.
It is arranged so that it can be rotated using C as a shaft support.

A heat insulating material 10 made of urethane foam is disposed in front of the back plate surface 1a of the fan housing 1 with a film 9 made of polyethylene interposed therebetween.

This heat insulating material 10 is hard and has a large coefficient of friction with the back plate surface 1a, and as is clear from FIG. ing.

That is, each of the heat insulating material elements 10-1. 10-2 is a back plate part 10C or 10d and a side plate part 10a.
Or, it is precepted from 10 b, and the back plate part 10 C
, 10d are shaped to have a vertical portion facing the back plate surface 1a, and upper and lower overhanging portions (not shown) projecting forward from the upper and lower sides of the vertical portion, respectively, and the side plate portions 10a, 10b is continuous with either the right side or the left side of the back plate portions 10C and 10d (7), and is shaped to protrude forward from each side.

The heat insulating material elements 10-C and 10-d are disposed in contact with the lower ceiling surface 1d, the upper bottom surface 1e, the left and right side wall surfaces 1b, and the IC of the fan housing 1, respectively.

Each of the heat insulating material elements 10-1 and 10-2 is made of polyethylene having a small coefficient of friction between the back plate surface 1a of the fan housing 1 and the heat insulating material 10 made of urethane foam at its back plate portion 10C or 10d. The side plates 10a and 10b are slidably brought into contact with each other via the film 9, and the side plates 10a and 10b are fixed to the side wall surfaces 1b and 1C in a pasted manner, respectively.
A circular hole is formed in the center of each of the holes, through which both ends of the rotating shaft of the fan 5 are connected to the bearing 8 and the motor 6.

Moreover, each heat insulating material element 10-1. Back plate part 1 of 10-2
The side ends 10e and 10f of 0C and 10d are provided with projecting plate portions 12a that project by a certain width from the side ends 10e and 10f, respectively.
, 12b are formed to extend, and the respective protruding plate portions 12 a , 12
b are disposed at appropriate locations between both side wall surfaces 1b of the fan casing 1 and the IC so as to be partially overlapped with each other.

That is, to explain this point in more detail, the protruding plate portion 12
a and 12b both have the same protrusion width, and
It has a wall thickness that is approximately half that of the back plate portions 10C and 10d, of which the protruding plate portion 12a extends from the front in the thickness direction of the side end surface of the back plate portion 10C, and the protruding plate portion 12b extends from the back. The back plate portions 10 are located at the rear of the side end surface of the plate portion 10d in the thickness direction.
C. Extending flush with the front surface or the rear surface of the back plate portion 10d, the protruding plate portions 12a, 12b and side end surfaces that do not extend in this manner are different from certain side end portions 10e, 10f.
and each protruding plate part 12 a , 1
2 b, with a heat insulating material element 10 in front of either tip thereof.
-1. Side ends 10 facing each other even during expansion of 10-2
f and 10 e are overlapped with each other to ensure a gap that does not hit them.

The illustrated embodiment is constructed as described above, and its effects will be explained below.

When the fan 5 is rotated by the motor 6, the air sucked in from the air suction port formed at the upper front of the front case undergoes heat exchange in the heat exchanger 4, and then is blown out from the lower front of the front case. In this case, immediately after the heat exchanger 4, the cold air or hot air is passed through the heat insulating material 10, that is, the pair of heat insulating material elements 10-1, 10-.
Direct contact with 2.

However, the insulation element 10-1. 10-2 have their side plates 10a and 10b fixed to the side wall surface 1b of the fan housing 1 and the IC, respectively, so they do not move at all, and the heat insulating material elements 10-1.
The left-right deformation due to expansion and contraction of 10-2 is made to appear as lateral movement of each of the back plate parts 10C, 10d, that is, movement towards or away from the back plate parts 10C, 10d. Since a polyethylene film 9 is interposed between d and the back plate surface 1a, even if each heat insulating material element 10-1, 10-2 expands or contracts, the back plate surface of the fan housing 1 remains unchanged. No frictional noise is generated between it and 1a, and no discomfort is caused to people.

It is important to keep the distances between each end of the fan 5 and the walls facing each side end to be uniform on the left and right sides to prevent air flow at both ends of the fan 5. This is necessary to prevent non-uniformity of the flow state, ensure fan performance, and prevent the generation of abnormal noise, but the expansion and contraction of the insulation elements 10-1 and 10-2 also cause the side plates to The above requirements can be met because the parts 10a and 10b do not move and the distance between each side end of the fan 5 and each side plate part 10a and 10b can be maintained evenly on the left and right sides.

In this case, each side plate portion 10a, 10b is fixed to each side wall portion 1b, IC, and the heat insulating material elements 10-1. 10
- Even when the fan 2 is contracted, it does not move in the left-right direction at all, so it may come into contact with each side end of the fan 5, which will impede the smooth rotation of the fan 5 and generate a collision noise. There is no such thing.

Furthermore, the back plate portion 10C of each heat insulating material element 10-1.10-2
, 10d have a fitted configuration in which the protruding plate portions 12-a and 12-b are partially overlapped with each other and are arranged with a certain gap between them. -1.10-2 In either case of expansion or contraction, it is possible to prevent the formation of a gap communicating from the front surface to the rear surface of the back plate parts 10C and 10d, and the heat exchanger during cooling operation can be prevented. The air cooled by 4 is transferred to each back plate portion 10C, 10
There is no possibility that dew will flow into the back plate surface 1a of the fan housing 1 from between the side ends 10e and 10f of the fan housing 1 and cause dew to form on the corresponding outer surface of the fan housing 1.

As explained above, in the present invention, the heat insulating material 10 in the above-mentioned indoor unit for an air conditioner is attached to one side plate portion 10.
It consists of a pair of heat insulating material elements 10-1 and 10-2 each formed by a, 10b and a back plate part 10C, 10d which are continuous to the rear edges of the side plate parts 10a, 10b. At the same time, each of the heat insulating material elements 10-1 and 10-2 is fixed with the side plate parts 10a and 10b attached to each of the side wall surfaces 1b and IC, respectively, and each of the back plate parts 10C, 1
0d is slidably brought into contact with the back plate surface 1a via a polyethylene film 9, and each of the back plate parts 10C,
Since each side end portion 10e, 10f of the heat insulating material element 10-1.1 is disposed facing each other with a gap between them.
The left-right deformation due to expansion and contraction of 0-2 appears as movement of the back plate portions 10C and 10d toward each other and away from each other, and this movement is caused by sliding through the polyethylene film 9 as described above. While using a certain type of hard insulation material 10 that is economical and easy to install, frictional noise is generated between the insulation material 10, that is, the insulation material elements 10-1 and 10-2, even when the insulation material elements 10-1 and 10-2 expand and contract. Never.

In addition, each side plate portion 10a of the heat insulating material element 10-1, 10-2
, 10b are each side wall surface 1b of the fan housing 1.
, since the individual plate parts 10 a , 10 b do not move in the left-right direction at all even during the expansion and contraction, and the side plate parts 10 a , 10 b do not move at all in the left and right direction.
10b and each side end of the fan 5 is maintained at a uniform size on the left and right sides to prevent the air flow state from becoming uneven at both side ends of the fan 5, and to improve the performance of the fan 5. In addition, even when the heat insulating material elements 10-1 and 10-2 are contracted, contact between each side plate portion 10a, 10b and each side end portion of the fan 5 can be ensured. can be reliably prevented.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II--II in the previous figure, showing the main parts. DESCRIPTION OF SYMBOLS 1...Fan housing, 4...Heat exchanger, 5...Fan, 9...Polyethylene film, 1o...Curved insulation material, 10 -1.10
-2...Insulating material element, 1a...Back plate surface, lb, IC......Side wall surface, 10a, 10b
...Side plate part, 10 C, 10 d...
- Back plate part, 10e, 10f... side end part.

Claims (1)

[Scope of utility model registration request] Back plate surface 1a of fan housing 1 of indoor unit
In front of the fan housing 1, both side wall surfaces 1b, I
A fan 5 having a shaft support C and a heat exchanger 4 are disposed, and the fan 5, the heat exchanger 4, and the back plate surface 1a
In an indoor unit for an air conditioner, in which a certain type of heat insulating material 10 that is hard and has a large coefficient of friction with the back plate surface 1a is disposed between the heat insulating material 10 and the back plate surface 1a,
, 10b and back plate portions 10C, 10d continuous to the rear edges of the side plate portions 10a, 10b, respectively.
The respective heat insulating material elements 10-1 and 10-2 are connected to the respective side plate portions 1.
0a and 10b are attached and fixed to the side wall surface 1b and the IC, respectively, and the back plate portions 10C and 10d are slidably brought into contact with the back plate surface 1a via a polyethylene film 9. and each of the back plate portions 10C, 10
An indoor unit for an air conditioner, characterized in that side end portions 10e and 10f of d are disposed facing each other with a gap.